andesitic


Also found in: Thesaurus, Encyclopedia.

andesitic

(ˌændɪˈzɪtɪk)
adj
relating to, or containing, andesite
Mentioned in ?
References in periodicals archive ?
This Cu-Au-Mo-fertile Yeoval intrusive complex consists of a suite of calc-alkaline granite and adamellite, intermediate and basic intrusive rocks with associated andesitic volcanic rocks.
- A large 2km by 1km soil anomaly with peak value of 1200ppm Zn and 700ppm Pb is associated with andesitic volcaniclastics and siltstones.
Both the CCW and the CCE zones contain hydrothermal breccias and multiphase stockwork veins with fine grained sulphides (pyrite, acanthite and sulfosalts), within andesitic volcanics that have been pervasively altered with silica and adularia, the main alteration assemblage.
These veins form a high-level silver-gold-base metals system, hosted in andesitic and rhyolitic rocks, centered on a large rhyolite dome complex in the north and silver systems in smaller rhyolite complexes to the southeast.
Fractional crystallization and partial melting then produces an intermediate magma and this process results in the spectacular andesitic stratovolcanoes typical of subduction zones (e.g., the Andes Mountains in South America and Java in Indonesia).
The well drained Ngaroma soil, is developed in Taupo Pumice (1800 years BP) on weathered rhyolitic and andesitic tephra, contains a loamy eluvial horizon over a sesquioxide and organic-rich horizon in the upper part.
Site Ujina 11 is found in PzTac (light green), which is a andesitic sequence; Ujina 8, Ujina 9 y Ujina 10 are found in K2gy (orange brown), which is a granodiorite intrusive; and Collahuasi 37 is found in N1N2qc (brown), which is a semi-consolidated clastic deposit.
Soil belong to Arenales soils series, which is a member of the mixed thermal family of Dystric Xeropsamments (Entisol) (CENTRO DE INVESTIGACION DE RECURSOS NATURALES, 1999) derived from andesitic and basaltic sands, deep (>150 cm) and with surface loamy texture and deep coarse sandy soil texture in depth.
The oldest known rocks in the study area are the Sinjrani Group which mainly consist of andesitic and basaltic lava flows.
The El Tigre gold and silver deposit is related to a series of high-grade epithermal veins controlled by a north-south trending structure cutting across the andesitic and rhyolitic tuffs of the Sierra Madre Volcanic Complex within a broad gold and silver mineralised prophylitic alternation zone.